If you are trying to move your Adobe Media Encoder presets between machines, or you want to share some of your bad ass presets with your parents as an anniversary gift… here is where you find them.
<user name>/Library/Preferences/Adobe/Common/AME/6.0/Presets
Its important to know you don’t need to copy over the one called “PresetTree.xml”, those represent the default settings that the good people at Adobe supplied you with.